Joined: Jan 2010
Posts: 9,835
Likes: 1,816
From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
When I unscrewed the plastic external "seal" ring from a 600 Uniglide freewheel, I was surprised to see that the locking cone underneath the seal had the markings of an MF-Z freewheel, so I believe that the bodies are identical.
The 600 freewheels got the added plastic shield and the cogs were a brighter shade of silver. Other than that...